Fabrication of a cost-effective polymer nanograting as a disposable plasmonic biosensor using nanoimprint lithography

Mohapatra, Saswat; Kumari, Sudha; Moirangthem, Rakesh S.

doi:10.1088/2053-1591/aa764e

Cited by 14 publications

(7 citation statements)

References 44 publications

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“…SPR seems to be an extremely significant situation, as label-free detection methods have been discovered to be effective and accurate for clinical analysis and molecular reactions [1][2][3]. The prism coupling strategy is the greatest widely utilized approach for (SP) generation across all SPR techniques.…”

Section: Fig 1: Surface Plasmon Wave In Gold Film By Using Kretschman...mentioning

confidence: 99%

“…The prism is coated with gold film (50 𝑛𝑚) that gathers evanescent waves generated by total reflections and releases. The gold/air boundary is used to release the SP wave once the angle is adjusted at a given value which is illustrated in figure (3). The photodiode sensor measures the amount of light that is reflected from the interface.…”

Section: Fig 1: Surface Plasmon Wave In Gold Film By Using Kretschman...mentioning

confidence: 99%

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Calculate The Resonance Angle of Surface Plasmon Resonance Gold film Configured with Kretschmann

Shwan¹

2022

Tikrit J. Pure Sci.

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The current work includes measurements of the resonance angle and reflectance for p-polarization of the electric field by using the Fresnel equation at a given length. Gold's surface plasmon wave can be seen at the metal-to-air boundary. We try to determine the greatest (SPR) angle for a metal thin layer that is most suitable for the surface plasmon excitation while stimulated by a laser. SPR was performed of a single film of gold placed on a glass prism; there are SPR modes in this structure, which match the surface plasmon. We also suggest that the SPR mode associated with the Au surface, which is extremely sensitive to changes in the surrounding environment, particularly (dielectric). A few considerations to be taken into account to attain the SPR, like the incident angle of light rays addressed and analyzed for the purpose of finding the essential value for the plasmon to be emerge; the gold/air resonance angle. Furthermore, we can compare our result with other work, which was performed by using the Finite-Element-Method (FEM), the simulation is done by FDTD (Finite Difference Time Domain) software. SPR was applied in a variety of domains, containing biomedicine science, optics, biomedicine, photo-thermal plasmon, and health.

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Section: Fig 1: Surface Plasmon Wave In Gold Film By Using Kretschman...mentioning

confidence: 99%

Section: Fig 1: Surface Plasmon Wave In Gold Film By Using Kretschman...mentioning

confidence: 99%

Calculate The Resonance Angle of Surface Plasmon Resonance Gold film Configured with Kretschmann

Shwan¹

2022

Tikrit J. Pure Sci.

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“…𝑆𝑃𝑅 becomes a more common occurrence as that was discovered that label-free detection techniques are appropriate and dependable for clinical analysis and biomolecular interactions. The SPR device's performance (sensitivity) is determined by metal layer optimization [5][6][7][8][9]. It has been observed that a material has the lowest amount of reflection at a given angle (resonance angle) compared to the other angle [10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Surface Plasmon Resonance (SPR) for Gold/Air Interface by using Kretschmann Configuration

shwan¹,

Ghafoor²,

Hamasalih³

2022

ETJ

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The greatest SPR achieved in angle of 45.1 𝑜 at 50𝑛𝑚 of gold.  The perfect region of SPR for the gold layer was in the range (40 − 50)𝑛𝑚.  SPR for gold/air depends on incident angle, refractive index, or dielectric medium and thickness.The coherent oscillation of electrons at contact among a dielectric and metal when the metal is exposed to incoming plasmon is known as "surface Plasmon resonance". To achieve the best surface plasmon resonance (SPR) signal, several aspects must be considered, including the excitation wavelength, the sort of metals used, and the thickness of the metal layer. The modification of the surface plasmon resonance (SPR) depending on the thickness of metallic gold was investigated in this study. The reflection spectrum is determined as a function of metal thickness and dielectric medium (air), which is fixed in this case, and measuring the resonance angle for each size (length of the gold layer) to visualize the influence of the metal film on the resonance angle. The analysis concentrated on the impact of gold layer thickness variations on resonance angle shift. SPR's ideal thickness was discovered to be 45-50 nm. We used the spin coating method to create a thin layer. The thickness of thin films is measured by scanning the sample with an atomic force microscope (AFM) tip. The optimum SPR angle profile with the minimum amount of reflection and dip reflection is achieved with this film thickness. The reflectance and resonance angle performance features of gold layers were analyzed utilizing plasmonic Kretschmann configurations at a wavelength (632.8 nm) in sensing media (air). In an experimental analysis of the improved surface plasmon resonance characteristics of the gold/air coupling, they also showed a significant shift in resonance angle due to the film thickness variation. Biomedical science, optics, biosensing, and medicine are just a few of the domains where the (SPR) has been applied.

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“…Many of these fabrication methods of gratings consist of several steps, which leads to a longer time required to structure fabrication. There have been presented interesting results of grating-coupled SPR sensors employing grating structures, mainly one-dimensional (1D) [ 26 , 27 , 28 , 29 , 30 , 31 ]. There is an effort to achieve grating-based sensors with high sensitivity and easy and cheap fabrication.…”

Section: Introductionmentioning

confidence: 99%

“…The grating-coupled SPR sensors were used as temperature sensors [ 21 ], RI sensors [ 24 , 25 , 33 , 35 ] and as biosensors [ 10 , 18 , 19 , 32 , 36 , 37 , 38 , 39 , 40 ]. Gold-coated polymer gratings brought an efficient way for fabrication of SPR gratings instead of using thick metal layers [ 29 , 30 , 35 , 41 , 42 , 43 ]. Although many of the presented SPR structures are large-scale, the reduction in their dimensions is needed for microfluidic and lab-on-a-chip (LOC) devices.…”

Section: Introductionmentioning

confidence: 99%

IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes

et al. 2021

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In this paper, we present a two-dimensional surface plasmon resonance structure for refractive index sensing of liquid analytes. The polymer structure was designed with a period of 500 nm and prepared in a novel IP-Dip polymer by direct laser writing lithography based on a mechanism of two-photon absorption. The sample with a set of prepared IP-Dip structures was coated by 40 nm thin gold layer. The sample was encapsulated into a prototyped chip with inlet and outlet. The sensing properties were investigated by angular measurement using the prepared solutions of isopropyl alcohol in deionized water of different concentrations. Sensitivity of 478–617 nm per refractive index unit was achieved in angular arrangement at external angle of incidence of 20°.

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Fabrication of a cost-effective polymer nanograting as a disposable plasmonic biosensor using nanoimprint lithography

Cited by 14 publications

References 44 publications

Calculate The Resonance Angle of Surface Plasmon Resonance Gold film Configured with Kretschmann

Calculate The Resonance Angle of Surface Plasmon Resonance Gold film Configured with Kretschmann

Optimization of Surface Plasmon Resonance (SPR) for Gold/Air Interface by using Kretschmann Configuration

IP-Dip-Based SPR Structure for Refractive Index Sensing of Liquid Analytes

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